MAX7403ESA+T

Overview

The MAX7403ESA+T is an 8th-order, lowpass, elliptic switched-capacitor filter operating from a single +5V supply. It features a sharp rolloff with a transition ratio of 1.2 and typical stopband rejection of 60dB. The corner frequency is clock-tunable from 1Hz to 10kHz using a 100:1 clock-to-corner ratio. Supply current is 2mA in operating mode and reduces to 0.2µA in shutdown mode. The device includes an offset adjustment pin (OS) for DC level control and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Provides steep attenuation characteristics suitable for anti-aliasing and post-DAC filtering applications
• Offers flexible clocking options via internal oscillator or external clock source for precise cutoff frequency control
• Includes a dedicated shutdown pin to minimize power consumption during inactive periods

Applications

• ADC Anti-Aliasing
• Speech Processing
• Post-DAC Filtering

Procurement Notes

Verify the component authenticity by checking the manufacturer markings against official documentation. Confirm the package type matches the required PCB footprint. Ensure the temperature grade suffix corresponds to the intended operational environment. Validate that the ordering information aligns with current product availability status.

Selection Notes

Select this component when a high-order elliptic response with a tight transition ratio is required. Ensure the system provides a stable +5V single supply. Verify that the available clock frequency allows for the desired corner frequency setting within the specified limits. Consider the shutdown functionality if power management is critical.

Part Context

This part belongs to the MAX7400 family of switched-capacitor filters. It shares the same physical package and pinout as other variants in the series but differs in electrical specifications such as supply voltage and filter response characteristics. The 'ESA' suffix indicates an industrial temperature range and SOIC packaging.

Replacement Considerations

The MAX7400 offers similar functionality but with a different transition ratio and higher stopband rejection. The MAX7407 provides comparable performance but requires a +3V supply instead of +5V. Verify compatibility regarding supply voltage and specific filter response requirements before substitution.